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Observing the emergence of a velocity hierarchy in matter waves — arXiv:2608.05241

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.05241
License (as archived): CC0-1.0
Archived: 2026-10-31T10:53:52.122Z
SHA-256 of the archived text: f051cf8554da25e48ca9345e0705f849ceda029fd39f4a40c1f59a0beb21163a
Stable URL of this page: https://metraipolis.com/documento/dc_005d508702db

How to cite

Observing the emergence of a velocity hierarchy in matter waves — arXiv:2608.05241 — arXiv (en), https://arxiv.org/abs/2608.05241 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_005d508702db (Metraipolis archive dc_005d508702db, sha256 f051cf8554da25e48ca9345e0705f849ceda029fd39f4a40c1f59a0beb21163a)

BibTeX

@misc{dc005d508702db,
  title = {Observing the emergence of a velocity hierarchy in matter waves — arXiv:2608.05241},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.05241},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_005d508702db; sha256 f051cf8554da25e48ca9345e0705f849ceda029fd39f4a40c1f59a0beb21163a},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.05241. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Classical waves in dispersive media naturally exhibit distinct phase and group velocities. Whether an analogous separation of velocities can emerge in matter waves under strong many-body interactions has remained experimentally unexplored. Here, we demonstrate the emergence of a velocity hierarchy in a strongly interacting lattice gas. Using quench spectroscopy together with time-resolved correlation measurements, we independently determine the sound, group, and phase velocities across the superfluid-to-Mott-insulator transition. These velocities are nearly degenerate close to the transition, but progressively separate as the Mott gap opens and the quasiparticle dispersion acquires a massive relativistic-like form. Strikingly, phase-coherence fronts propagate faster than the Lieb-Robinson velocity scale while remaining fully consistent with locality. The measured velocities satisfy a relativistic-like invariance relation in the insulating regime. Our results establish propagation-velocity hierarchies as emergent signatures of strongly correlated quantum dynamics.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-08-07 in quant-ph).
Categorie arXiv: Quantum Gases (cond-mat.quant-gas) ; Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2608.05241 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-31T10:40:45.633Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-08-07?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).